There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
--- Peter Broekhuijsen ---

  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Amphimachairodus giganteus

smedz Offline
Regular Member
***
#1

Post whatever information is available on this big cat. We can answer questions like.... 

1. What was on the menu? 

2. What were it's rivals? 

3. Was it social? 

4. Was there any sexual dimorphism? (if social, this can give an insight as to how the social structure probably worked) 

5. What was the estimated weight? 

I'll answer 3., they did coexist with Adcrocuta  hyenas, which likely lived in clans, so a social system would have been helpful in defending kills, territory, cubs, and mates.
1 user Likes smedz's post
Reply

Canada Acinonyx sp. Offline
Cheetah Enthusiast
***
#2

Amphimachairodus giganteus

Amphimachairodus is an extinct genus of large machairodonts belonging to the clade known as Eumachairodontia (true saberteeth) along with relatives like Smilodon and Homotherium. It inhabited Eurasia and Northern Africa during the late Miocene epoch.
There was marked sexual dimorphism in A. giganteus, with males much larger than females. A single fossil specimen examined by Legendre and Roth was determined to have an approximate body mass of 201.8 kg. Amphiachairodus kabir was a large species from Central Africa whose size may have approached 470 kg with a range of 350-450 kg.
It was about 2 metres long and probably hunted as an ambush predator - its legs were too short to sustain a long chase, so it most likely was a good jumper. It probably used its canines to cut open the throat of its prey. Its teeth were rooted to its mouth and were not too delicate, unlike most saber-toothed cats of the time, which had extremely long canines that hung out of their mouths. The fangs, however, were able to easily fit in its mouth comfortably while being long enough to be effective for hunting.
This specimen was from a large male A. giganteus with the skull measuring 36 cm from the Late Miocene in China. Deformation of the skull through natural fossilization processes has changed the shape slightly, making it asymmetrical, but overall it remains an excellent specimen for studying the cranial morphology of this particular genus and species.
For felines, this skull is very large, surpassing the size of most modern lions. When compared with a lion, it is long and very narrow, particularly in the muzzle and width of the zygomatic arches. Its sagittal crest is well pronounced. Compared with other machairodonts, the canines are stout and capable of large amounts of stress. This characteristic is slightly remodeled in females, whose canines are slimmer and generally longer. Compared with females, the orbit of males are smaller, muzzles larger, the anterior-most portion of the nasal bones generally flare upwards slightly, and the downward slope of the dorsal edge of the skull in front of the orbit is not as pronounced, producing a straighter profile. Compared with the most well known machairodont Smilodon, commonly referred to as the "saber-toothed cat", the canines are much shorter, the facial portion again is much longer, and the teeth not reduced so far in number. Several machairodonts, namely Megantereon, bear flanges on the mandible, which are very reduced in A. giganteus though characteristics of the mandible associated with the flanges are present, particularly the lateral flattening of the anterior portion of the mandible, creating a cross section more square than semi-circular. The dental formula for this specimen is I3/3 C1/1 P2/2 M1/1.

 



 Source:https://prehistoric-fauna.com/Amphimachairodus-giganteus

I am not able to format this properly.There is a software issue in wildfact.it would be great if the mods can help.
2 users Like Acinonyx sp.'s post
Reply






Users browsing this thread:
1 Guest(s)

About Us
Go Social     Subscribe  

Welcome to WILDFACT forum, a website that focuses on sharing the joy that wildlife has on offer. We welcome all wildlife lovers to join us in sharing that joy. As a member you can share your research, knowledge and experience on animals with the community.
wildfact.com is intended to serve as an online resource for wildlife lovers of all skill levels from beginners to professionals and from all fields that belong to wildlife anyhow. Our focus area is wild animals from all over world. Content generated here will help showcase the work of wildlife experts and lovers to the world. We believe by the help of your informative article and content we will succeed to educate the world, how these beautiful animals are important to survival of all man kind.
Many thanks for visiting wildfact.com. We hope you will keep visiting wildfact regularly and will refer other members who have passion for wildlife.

Forum software by © MyBB